On a SATA 3.0 pc?Because it should stop any read/write operation to trim the SSD according to 3.0 specs ?? Unless recent SSDs have a workaround/own solution for that when the sata version is 3.0 or just to increase performance on any sata revision.

What is your SSD, and are you on the latest FW? What operating system are you using too? Some older SSD maybe only use garbage collection, or older OS, which can freeze a little sometimes. Same applies with some FW, some older firmware had freezing issues on certain SSD's

Please don't send me PM's for help on BIOS edits, I cannot help with BIOS in PM'sPlease make a thread and I will try to help as soon as I can - thanks!